Weibull衰落信道下多跳通信系统的性能分析

Performance of Multihop Communication Systems over Weibull Fading Channels

分析了在独立不同分布Weibull衰落信道下配有非再生中继的多跳无线通信系统性能.基于调和几何平均不等式,得到了更易于数学处理的端到端信噪比上界.通过计算上界的矩母函数、概率密度函数和矩等闭式表达式,得到了多跳通信系统的平均端到端信噪比、信道容量和平均误比特率等重要性能界.数值仿真结果表明该界是紧的.

End-to-end performance of multihop wireless communication systems with non-regenerative relays operating over independent not necessarily identically distributed Weibull fading channels is presented. Based on the inequality between harmonic and geometric means, the end-to-end signal-to-noise ratio （SNR） is bounded upper. Novel expressions are derived for the moment-generating, probability density, and moment functions of the bound in closed form. Using these statistical results, convenient closed-form bounds are obtained for the average end-to-end SNR, the channel capacity, and the average bit-error probability of multihop wireless communication systems. Numerical results show the tightness of the proposed bounds.